X—ray photoelectron spectroscopy study on adsorption property of harmful air pollutants on zeolite prepared from fly ash

Photocatalytic degradation of noxious water and air impurities like Methylene blue (MB), Rhodamine B (RhB), NO x-, and CO is carried out by pristine and Ti-doped BaMnO 3 (BaMn 0.85 Ti 0.15 O 2.93 , BMT). Perovskite BMT ceramic mixed with equimolar ratio of zeolite is used for investigation of water and air pollutant degradation. The synthesized Ti-doped BaMnO 3 (BaMn 0.85 Ti 0.15 O 2.93 , BMT) perovskite was characterized using X-ray diffraction (XRD) and FE-SEM techniques. The XRD pattern of Ti-doped BaMnO 3 shows the formation of two phases, namely BaMnO 2.92 and BaMn 0.85 Ti 0.15 O 2.93 and BMT. The photocatalytic degradation of noxious water and air pollutants were analyzed using UV-Vis and XPS for doped and pristine BaMnO 3 . From obtained results, it is observed that the synthesized BMT shows enhanced photocatalytic degradation (~ 99%) as compared to BaMnO 3 toward noxious water impurities like RhB and MB dyes within 270 and 150 min under sunlight. The synthesized BMT compound shows the absorbance spectrum in the wavelength range of 200-600 nm. The UV-Vis DRS confirms the absorption edges for the compound above 400 nm i.e., visible light absorber with a bandgap 2.48 eV. On the other hand, XPS analysis of bulk BMT-zeolite on exposure to sunlight shows the complete degradation of adsorbed NO x gases from the BMT-zeolite surface as compared to the unexposed zeolite sample surface. Therefore, BMT can be used as active photocatalytic agent for the remediation of environmental noxious water and air pollutants.

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“…The peak analysis shows the existence of BaMn 0.85 Ti 0. 15 [12,33]. Figure 2 shows the XRD pattern for synthesized BaMnO 2.98 .…”

Section: Characterization Studiesmentioning

confidence: 99%

“…The microstructure clearly reveals the formation of flake-like nature of the grains with the particle size in the range of 1-2 μm lengths. Whereas, the synthesised zeolite for the adsorption of toxic air pollutants shows different morphological features and is described elsewhere [33].…”

Section: Characterization Studiesmentioning

confidence: 99%

Ti doped BaMnO3 perovskite structure as photocatalytic agent for the degradation of noxious air and water pollutants

et al. 2020

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“…The computation fluid dynamics (CFD) simulations as the computational methods and Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) as the experimental methods are very effective tools for analyzing the adsorption phenomena and scaling up. However, it is hard to investigate adsorption mechanisms and choose the optimum type of adsorbent, competition of pollutants for adsorbent surface binding, adsorption isotherms, and adsorption mechanisms by implementing these tools.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Sorption Mechanisms of Environmental Pollutants Using Molecular Simulation

Mousavi

Shadman

Habibi

et al. 2023

Ind. Eng. Chem. Res.

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With the global expansion of industrial activities, the entry of various pollutants into the environment has remained a serious issue. One of the best ways to remove these pollutants is to use the adsorption method. Understanding adsorption mechanisms to improve and optimize adsorbents are pivotal for adsorbent development. In this study, the application of molecular simulation in developing various adsorbents has been reviewed. A variety of molecular simulation methods such as molecular dynamics (MD), density functional theory (DFT), hybrid quantum and classical molecular dynamics (QM/MM), ab initio molecular dynamics (AIMD), and coarse-grained molecular dynamics have been used to study these processes. Although hardware limitations prevented researchers from using this method for real systems, this problem has been solved thanks to the development of computing power units (CPUs) and graphic processing units (GPUs). Due to the increasing use of molecular simulations, an attempt has been made to review previous work in this field. Investigations were conducted on various capabilities of molecular simulations in studying the adsorption process and its limitations. In addition to lowering the cost and time of industrial research, this study advances molecular simulations in academic studies. These simulations can reveal the mechanisms underlying adsorption and the selection, development, and design of suitable adsorbents and adsorption processes. Although investigating the adsorption mechanisms for the selection and design of the process is a complicated problem, this work tends to shed light on almost all types of molecular simulations and their applications in studying the adsorption process of removing various environmental pollutants by various adsorbents.

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“…Many researchers have reported the removal of pollutants such as arsenic [9,10], radio cesium [11], lead and cadmium [12], fluoride [13], phosphate [14], ammonia ion [15], triphenylmethane dye, acid fuchsin [16] and crystal violet [17] from aqueous solution by zeolites synthesized from FA. In addition, the synthetic zeolite from FA was widely used to treat gaseous pollutants such as sulfur dioxide [18], nitric oxide, nitrogen dioxide, nitrous oxide, and carbon monoxide [19]. At present, there are many reports about the synthesis of ZSM-5 zeolite from FA [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZSM-5 zeolite from fly ash and its adsorption of phenol, quinoline and indole in aqueous solution

Liu

2020

Mater. Res. Express

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This work tries to synthesize ZSM-5 zeolite using fly ash (FA) by hydrothermal method and study the adsorption effect of the zeolite on phenol, quinoline and indole in aqueous solution. The zeolites were characterized with x-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray fluorescence (XRF), fourier transformation infrared (FTIR) and N 2 adsorption-desorption isotherm. The characterization results showed that HZSM-5 zeolite was successfully synthesized. The higher mass ratio of sodium carbonate to fly ash during melting is beneficial to improve the purity of ZSM-5 zeolite and its removal rate of organic matters. These results have been confirmed by XRD and principal component analysis (PCA). The adsorption process of phenol, quinoline and indole in aqueous can be well described with the double exponential kinetic model. The adsorption capacity of ZSM-5 zeolite for phenol, quinoline and indoles can be up to 24.41 mg g −1 , 35.99 mg l −1 and 34.05 mg g −1 respectively, and the removal rates can reach up to 82.80%, 84.86% and 83.20% respectively. The optimal pH value for adsorption ranges from 5 to 7.

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X—ray photoelectron spectroscopy study on adsorption property of harmful air pollutants on zeolite prepared from fly ash

Cited by 9 publications

References 15 publications

Ti doped BaMnO3 perovskite structure as photocatalytic agent for the degradation of noxious air and water pollutants

Ti doped BaMnO3 perovskite structure as photocatalytic agent for the degradation of noxious air and water pollutants

Elucidating the Sorption Mechanisms of Environmental Pollutants Using Molecular Simulation

Synthesis of ZSM-5 zeolite from fly ash and its adsorption of phenol, quinoline and indole in aqueous solution

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